Boiler-furnace.



0-. H. WILSON. BOILER FURNACE.

APPLICATION FILED JUL-1 9, 1906.

MQAMSI. Patented Feb. 15, 1910.

2 sums- :53am 1.

WITNESSES: NVENTORQ Q. ATTORNE Y5 G. H. WILSON. BOILER FUBNAGE.

APPLIOATION nun JULY 9, 1906.

94:9,@%& V Patented. Feb. 15, 1910.

Z SHEBTS-SHBET 2,

WITNESSES: INVE TOR,

1 M I I @LW A TTORNE Y5 pair a sa CHARLES HENRY WVILSON, OF PADUCAH, KENTUCKY.

BOILER-FURNACE.

Specification of Letters Patent.

Application filed July 9, 1906.

Patented Feb. 15, 1910. SeriaI No. 325,356.

To all whom it may concern:

Be it known that I, CHARLES H. \VILsON, a citizen of the United States, residing at Paducah, in the county of McCracken and State of Kentucky, have invented a new and useful Boiler-Furnace, of which the following is a specification.

This invention relates to a furnace for steam or hot water boilers, kilns, and other apparatus requiring furnaces, and it has for one of its objects to improve and simplify the construction of such furnaces so that substantially all the heat obtained from combustion is utilized, thereby lessening the consumption of fuel, and increasing the economy of operation.

A further object is to so organize and proportion the parts of the furnace as to produce a balanced draft between the fire box and boiler furnace and to permit the smoke and gas-es to be thoroughly consumed before passing into the boiler tubes so as to better heat the boiler.

Vith these objects in view, and others, as will appear as the nature of the invention is better understood, the invention comprises the various novel features of construction and arrangement of parts, which willbe more fully described hereinafter and set forth with particularity in the claim appended hereto.

In the accompanying drawings, which illustrate one of the embodiments of the invention, Figure 1 is a longitudinal section of the furnace in connection with a steam boiler. Fig. 2 is a plan view of the furnace showing the boiler removed. Figs. 3 and 4 are transverse sections on lines 33 and -l4, respectively, of Fig. 1. Fig. 5 is a perspective view of the bridge and fire bed or wall of the furnace.

Corresponding parts in the several figures are indicated throughout. by similar characters of reference. 1

Referring to the drawings, 1 designates a .fire tube boiler of any desired construction.

The furnace comprises two parallel, vertical walls 2 built upon a suitable foundation, indicated at 3. The front of the furnace may be walled in, in any desired manner, as by means of the iron front 4, the same being provided with fire box and ash pit doors 5 and 6, respectively. The rear end of the furnace is closed by the vertical end wall 7 also built on the foundation 3. The

boiler 1 is adapted to be set on the side walls in any approved manner.

At the front end of the boiler is the fire box 8 and ash pit 9, the grate bars of the fire box being indicated at 10. These bars are supported at their ends on suitable brackets or equivalent means 11 on the front 4 and the bridge wall 12 extending transversely of the furnace. The grate bars are inclined downwardly in a forward direction I from the bridge wall so as to render the cleaning of the fire more easy, since the clinkers work to the front and close to the door. The rear ends of the grate bars are about on a level with the lowest point of the top surface or bridge of the wall 12. As viewed in a longitudinal section, the top of the bridge wall 13 inclines upwardly from the firebox and in a transverse direction it is concentric with the boiler 1.

Extending parallel with and spaced apart from the wall 12 is a second wall 14 which, with the wall 12, supports the fire bed or wall 15. The fire bed 15 inclines downwardly in a longitudinal direction from the rear end of the bridge to the top of the wall 14. In a transverse direction, the bed 15 is concentric with the boiler at every point along its length. The rear end of the bed is formed by the top surface of the wall 14, the said surface being concentric with the boiler in a transverse plane and convex or curved downwardly from the general slope of the bed. By thus arranging the bridge, bed and upper surface of the wall 14 concentric with the boiler, the latter is more evenly heated and the fire gases or fiames spread uniformly over a wider area. The bridge and bed are made of fire brick and the space intermediate the walls 12 and 14 is filled with sand, as indicated at 16, and the bed is laid on top of the sand. This provides a massive and substantial structure which becomes highly heated and is capable of retaining for a considerable time the heat and of giving it out gradually.

Intermediate the rear wall 14 of the bed and the end wall 7 of the furnace are two combustion chambers 17 and 18 that are separated by a wall, the portion 19 of which is perforated. The perforated portion of the wall is built of fire brick on a solid base portion 20 also built of fire brick. A definite relation exists between the total areaof the perforations, which latter are indicated at 21, and the cross sectional area of the boiler I fiues, so as to produce an efficient draft. That is to say, the area of the perforations is preferably equal to the flue area of the boiler. The lower portions of the front and rear combustion chambers 17 and 18 form ash pits having doors 22. The bottoms of the ash pits are rounded so as to permit the gases, under the influence of the draft, to create a whirling action in the bottoms of the combustion chambers and thereby pick up the soot an other unbruned carbonaceous particles so that they will be completely consumed. The fire gases in passing from the bed 15 strike upon the perforated wall 19 and partly pass through the perforations thereof and are partly deflected downwardly into the bottom of the chamber 17. The curved portion 23 of the bed facilitates the gases turning downwardly into the bottom of the combustion chamber 17, so that an effective agitation takes place and effects a better combustion. The upper corner edges of the wall 20 are cut away, as at 24:, so as to prevent the formation of projections that would otherwise interfere with the agitation of the gases and the products of combustion.

The rear end of the boiler is separated from the rear wall 7 of the furnace at such a distance as to provide an outlet area from the combustion chamber 18 to the fines of the boiler equal to the area between the boiler and the bridge at the front edge of the latter. This enables a balanced draft to be produced through the furnace. The wall 19 as shown in Figs. 1 and 3, extends around the boiler at its upper ends and is slightly separated therefrom so as to provide a heating space between them which, in addition to the perforations, permits the fire gases to pass to the rear combustion chamber. This wall battles the passage of the fire gases to a certain extent and accordingly provides for subjecting them to a prolonged or extended combustion action and permits the gases to burn more completely in the front combustion chamber before passing to the rear combustion chamber to be completely burned. 1

From the foregoing description, taken in connection with the accompanying drawings, the advantages of the construction and method of operation will be readily apprel ciated by those skilled in the art to which the invention appertains. In operation, the circular and upwardly inclined bridge 13 deflects the fire gases against the boiler and entirely around the exposed surface thereof, and, as the gases pass from the bridge and over the bed 15, further combustion takes place and the flames are forced to closely envelop the exposed portions of the boiler above the bed. The unburned particles are further consumed in the combustion chambers 17 and 18 and the gases give up more of their heat and, by the time the gases have passed through the fines of the boiler, the heat is practically all utilized. In actual practice I have found that in equipping a boiler with the present furnace construction, the elliciency was increased about twentyfive per cent.

I have described the principle of operation of the invention, together with the apparatus which I now consider to be the best embodiment thereof, but I desire to have it understood that the apparatus shown is merely illustrative, and that various changes may be made, when desired, as are within the scope of the invention.

hat is claimed is p In a furnace having at one end a fire box, and at the other end a combustion chamber, and a fire-bed between the fire box and the combustion chamber, the end of the fire bed being curved downwardly in the direction of the floor of the combustion chamber, and said floor being located below the top of the fire bed, the wall rising from the floor of the combustion chamber, and extending across the same, the upper corners of said wall being cut away on a curve, and said curved portions being located below the plane of the curved end of the fire-bed, the floor of the combustion chamber on opposite sides of the wall being concaved, and a perforated partition rising from the top of said wall, a portion of the perforations of said partition being located below the top of the firebed.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

CHARLES HENRY WILSON.

Vitnesses F. E. LACK, IV. H. PARHAM. 

